Hm. I remember reading about it, but it isn't bookmarked. So i probably missed something. What i didn't write in my post, was different symbology at different levels of zoom. But you got the general idea, and I what you probably mean.

edit: Would maybe look nice, but not very useful, to only have platonic solids, however they are connected. I'm thinking of icons/thumbnails also, like in airports, stations, symbolising data types, (line)encoding schemes, combined with something like https://en.wikipedia.org/wiki/Shunting-yard_algorithm / https://en.wikipedia.org/wiki/DRAKON depending on context/zoom level and simply NOT fitting to each other, if you try to couple them in incompatible/unsafe ways.

2nd edit: the same for common algorithms, have some box/body, define the range/width of possible inputs via some sliders/knobs, which change the possible plugs, ready.